Articles | Volume 15, issue 3
Ocean Sci., 15, 489–512, 2019
https://doi.org/10.5194/os-15-489-2019
Ocean Sci., 15, 489–512, 2019
https://doi.org/10.5194/os-15-489-2019

Research article 09 May 2019

Research article | 09 May 2019

Cold vs. warm water route – sources for the upper limb of the Atlantic Meridional Overturning Circulation revisited in a high-resolution ocean model

Siren Rühs et al.

Data sets

ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis C. Amante and B. W. Eakins https://doi.org/10.7289/V5C8276M

Quantitative ARIANE trajectories for the upper limb of the SAMOC calculated from 5-day mean velocities of hindcast simulation KFS044 with ocean model INALT20 S. Rühs https://data.geomar.de/thredds/catalog/open_access/ruehs_et_al_2019_os/catalog.html

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Short summary
We revisit the sources for the upper limb of the overturning circulation in the South Atlantic by tracking fluid particles in a high-resolution ocean model. Our results suggest that the upper limb’s transport is dominantly supplied by waters with Indian Ocean origin, but the contribution of waters with Pacific origin is substantially larger than previously estimated with coarse-resolution models. Yet, a large part of upper limb waters obtains thermohaline properties within the South Atlantic.